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// Tests that mongos and shard mongods can both be started up successfully when there is no config
// server, and that they will wait until there is a config server online before handling any
// sharding operations.
//
// This test involves restarting a standalone shard, so cannot be run on ephemeral storage engines.
// A restarted standalone will lose all data when using an ephemeral storage engine.
// @tags: [requires_persistence]
(function() {
"use strict";
var st = new ShardingTest({shards: 2});
jsTestLog("Setting up initial data");
for (var i = 0; i < 100; i++) {
assert.writeOK(st.s.getDB('test').foo.insert({_id:i}));
}
st.ensurePrimaryShard('test', 'shard0000');
st.adminCommand({enableSharding: 'test'});
st.adminCommand({shardCollection: 'test.foo', key: {_id: 1}});
st.adminCommand({split: 'test.foo', find: {_id: 50}});
st.adminCommand({moveChunk: 'test.foo', find: {_id: 75}, to: 'shard0001'});
// Make sure the pre-existing mongos already has the routing information loaded into memory
assert.eq(100, st.s.getDB('test').foo.find().itcount());
jsTestLog("Shutting down all config servers");
for (var i = 0; i < st._configServers.length; i++) {
st.stopConfigServer(i);
}
jsTestLog("Starting a new mongos when there are no config servers up");
var newMongosInfo = MongoRunner.runMongos({configdb: st._configDB, waitForConnect: false});
// The new mongos won't accept any new connections, but it should stay up and continue trying
// to contact the config servers to finish startup.
assert.throws(function() { new Mongo(newMongosInfo.host); });
jsTestLog("Restarting a shard while there are no config servers up");
MongoRunner.stopMongod(st.shard1);
st.shard1.restart = true;
MongoRunner.runMongod(st.shard1);
jsTestLog("Queries should fail because the shard can't initialize sharding state");
var error = assert.throws(function() {st.s.getDB('test').foo.find().itcount();});
assert.eq(ErrorCodes.ExceededTimeLimit, error.code);
jsTestLog("Restarting the config servers");
for (var i = 0; i < st._configServers.length; i++) {
st.restartConfigServer(i);
}
jsTestLog("Queries against the original mongos should work again");
assert.eq(100, st.s.getDB('test').foo.find().itcount());
jsTestLog("Should now be possible to connect to the mongos that was started while the config "
+ "servers were down");
var mongos2 = null;
assert.soon(function() {
try {
mongos2 = new Mongo(newMongosInfo.host);
return true;
} catch (e) {
printjson(e);
return false;
}
});
assert.eq(100, mongos2.getDB('test').foo.find().itcount());
st.stop();
}());
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